The Shadow Update for Ball x Pit introduces two new characters, The Tiptoer and The Tunneller, along with four new passive abilities, 11 new balls, and a guildhall for players to build. The Tiptoer can evade detection by enemies, while The Tunneller can fire balls that wrap around the screen's edges. The new balls include one that manipulates time, one that immobilizes enemies, and one that allows for random teleportation. The update also features the Full Metal Rapier passive ability, which scales damage based on the number of elements on screen, and the Arrow of Fate, which grants projectile immunity and releases smaller balls upon being hit. The update is available for free on Steam and adds 18 new elements, creating 88 combinations of characters, passives, and balls.